Typewriting machine



Aug. 24, ,1937. ROSE 2,090,900

- I TYBEWRI'IING MACHINE Filed July 28, 1932 V s Sheets-Sheet 1 I, I I

EEQUIRGE E R1355 INVENTOR ATTORNEY Aug. 24, 1937. G. F. ROSE YTYPEWRITING MACHINE 5 Sheets-Sheet 2 2 5 9 l 8 2 y l H J d e 1 i FINVENTOR GEEIREE F. ma

ATTORNEY Aug. 24, 1937. ROSE 2,090,900 I TIPEWRIFPING MACHINE Filed July28, 1932 3' Sheets-Sheet 3- 6 EEURGE E RQSE INVENTOR (\TTORNEY PatentedAug. 24, 1937 UNITED STATES PATENT OFFlCE TYPEWRITING MACEINE George F.Rose, New York, N. Y.

Application July 28, 1932, Serial No. 625,262 11 Claims. 01. 19'z e Thisinvention relates to typewriting machines and more particularly to thestriking type bar variety and it provides, as one of its importantobjects, a unique and novel work carriage bedplate that preferably isstamped up from sheet metal of weight and dimensions to withstand thestrain for which it is intended.

Another object is to prepare the bedplate for the reception of variousother elements which 1 will be carried thereby.

A further object is to assemble the other elements and attach them tothe bedplate, preferably by spot-welding, in a manner that makesassemblage of. the machine much more simplified and the operationthereof more efiicient, as well as adding to the compactness of themachine.

Still further objects are to provide a novel manner of attaching thepaper guide to the carriage bedplate, a novel carriage gib that performsother duties in addition to retaining the carriage and carriage bedplatetogether, a novel back spacing pusher and manner of operating it as wellas a new and unique bracket upon which both the escapement mechanism andcarriage locking means are assembled.

Referring to the drawings,

Fig. 1 is an elevation of the .bedplate and attached parts, looking fromwhat would normally be the front of the machine;

Fig; 2 is a View similar to Fig. 1, looking from what is normally therear of the machine;

Fig. 3 is a top plan view of the bedplate alone;

Fig. 4 is a section of the bedplate, taken on line 44 of Fig. 3 andlooking in the direction of the arrows;

Fig. 5 is a view similar to Fig. 4, but looking in the oppositedirection;

Fig. 6 is'a side-elevation of. a typewriting machine, partly in sectionand with some parts broken away for clarity, showing the bedplate inposition on the machine;

Fig. 7 is a side-elevation of the carriage gib;

Fig-8 is a vertical section taken on the line 83 0f Fig. 7;

Fig. 9 is also a vertical section taken on the line 99 of Fig. 7;

Fig. 10 is a top plan view of the back spacing mechanism;

Fig. 11 is a front elevation of part of the back spacing mechanism;

Fig. 12 is a sectional view of the paper guide, taken on its verticalcenter;

Fig. 13 is a perspective view of the escapement 55 hanger, and

Fig. 14 is a front elevation of the hanger and attached parts.

Like reference characters indicate similar parts throughout the severalviews.

While the invention herein described and claimed may be used in any typeof typewriting machine, it is particularly well suited for the portabletype and I have shown it in connection with the variety of typewritersknown commercially as Masspro.

Referring especially to Fig. 1 and Fig. 2, the numeral i represents thecarriage bedplate having spot-welded near the ends thereof the posts 2that slide in carriage guides attached to the frame and at the pro-perpoint therein the bell 3 supported by the bell-holding bracket 4.

At approximately the center is the escapement and carriage lockingmechanism, indicated generally-by the numeral 5. The hanger 6 ispreferably spot-welded to the bedplate I through the three feet 1, 8,and 9 (Fig. 13 and Fig. 14) the feet "I and 8 being on one side of'agroove in the bedplate while the foot 9 is on the other side, thisconstruction and three point support making the hanger very firm andbetter able to carry the strain which is imposed upon it. AttheEOW-er'endof the hanger the handle ID of the carriage lock ispivoted, as shown at II and above the pivot is a finger l2, protrudingthrough a hole in the hanger 6, which disengages the escapement pawlsfrom the escapement rack when the handle H3 is pressed forwardly and atthe same time locks the carriage by means of an extension also locatedon the handle and above the finger I2 engaging with the stop rack on thecarriage. This carriage locking mechanism is fully described in myPatent #1577210. The hanger'fi also has pivoted toward the lower endthereof, on the pivot l3 which extends through openings i l and 15, theescapement frame I6, of which the uppermost point ll acts as one pawl ofthe carriage control means and has pivoted thereto at IS the loose pawlI!) which is actuated parallel to the carriage by the spring Zil, theseelements cooperating in the usual manner to control the movement of thecarriage. The movement of the pawls is caused through pressure beingapplied by the universal bar (not shown) upon the end 2| of theescapement operator 22 which is pivoted to the hanger 6 at the point 23and has its other end 24 turned at an angle and positioned behind theframe l6 so that the frame will be pushed forward when the abovereferred to pressure is applied and returned to its rearward or normalposition by the spring 25 which is attached to the projection 26 of theframe 16 and to the projection 27 of the hanger 6, this latterprojection being stationary with reference to projection 25. Thecarriage release is operated through a carriage release bar (not shown)pressing rearward on the anti-friction roller which is attached to andturns on the carriage release arm 36, the arm being pivoted to thehanger 6 at the point 31, the lower end being positioned behind theprojection 38 of the frame it to move the frame forwardly when theroller 35 is moved rearwardly. The bentback ear 39 acts as a rearwardstop for the frame it. The motive means for moving the carriage isindicated by the numeral 48 and is suspended from the bedplate by thebracket 4 l.

Pivotally attached to the lug 42 by the screw 43 is a bell crank 44(partly broken away) which operates the ribbon vibrator (not shown)while almost directly in back of bell crank 44 is the back space pusher45 pivoted on a lug 46 by the screw 4? and it is held in inoperativeposition by the spring 48 which is anchored to the bedplate l throughprojection 49.

Referring more particularly to Figs. 10 and 11, the back space pusher isturned up at one end as indicated at 50 for the purpose of cooperatingwith the rack bar 5| which is on the carriage. Another turned up portion52 also at this end, acts as a guide to keep the pusher from wobbling bycontacting with the forward side of the rack bar 5! in conjunction withthe portion 53, of the body of the pusher, contacting with the rearwardside of gib 54. At the opposite end is a slot 55 which slides on thescrew 4'! while at a point approximately just below the screw 4! is thedepending arm 56 offset as at 51. An opening 59 (Fig. 10) is provided inthe frame 60 through which the connecting rod 6| extends, this rod beingattached at one end to the pusher 45 through the hole 58 and at theother end to the actuating ver 62 which is pivoted to the lug 63,extending from the frame of the machine and preferably integraltherewith, by the pivot 64. When the lever 62 is moved toward the framethe rack engaging portion 50 will be lifted to mesh with the rack bar5!, further movement of the lever will move the carriage a space in theback direction. This simplified construction provides a back spacerwhich consists essentially of but three parts, the lever, the connectingrod and the pusher.

The upwardly extending portion 15 Fig. 3 provides a seat to which thepaper guide 16 may be fastened by a single screw 11 and is kept fromturning if the screw becomes loose by the turnedback portions 18 fittingclosely around the edges of projection 15. The assembling of thiselement requires only a few seconds but at the same time provides anextremely firm and durable setting for the guide.

The opening 19 is to permit the carriage release arm 35, carrying theroller 35, to extend through the bedplate l as well as to permit thepawls l1 and ii) to extend therethrough and work with the carriage rackbar.

The downwardly extending portion provides a seat for the carriage gib54, the details of the gib being more clearly shown in Figs. 7, 8 and 9.The carriage locking mechanism handle I!) Works in and is guided by theslot 8|, the horizontal portion of which is formed by the lateralprojections 32 and 83 and when the handle is in locking position the gibbears all the strain of holding the carriage from moving as theescapement mechanism has been moved to inoperative position ashereinbefore explained. The upwardly projecting lug 84 is slightlyoffset from the body of the gib which arrangement removes it from thepath of the carriage stops and it acts as a brace or support for thehandle ID, the natural tendency of the carriage being to force thehandle against the lug 84. The gib has another projection 85 upon whichthe rack engaging end of the back space pusher rests, this projection 85has its upper portion turned at right angles to the body of the gib thusaffording a flat base upon which the back space pusher may rest, but itis wider than that portion of the pusher resting upon it and the rightand left hand edges which extend beyond the rack engaging end of thepusher may act, without interference either to or by the pusher, as acarriage stop against which the stops on the carriage may contact. The.gib has a still further purpose in acting as a retaining means byslidably retaining the rear end of the carriage on the carriagebedplate.This is accomplished by turning down the portions 86 and 81 atsubstantially right angles to the body of the gib, this latter featurealso serving to greatly strengthen the gib so that there is no questionof its easily withstanding the various strains placed upon it. It isbelieved that the remarkable utility of this simple little element andthe manner in which it cooperates with other elements of the machinewill be quite evident from the above explanation. It is held in place onthe projection 35 by two screws 88 and 89 entering the openings 88 and8! of the gib and 92 and 93 of the projection. The openings arepreferably elongated or in the form of slots in order to permit ofadjusting the clearance between the portions 86 and 81 and the rear ofthe carriage, this feature being highly desirable because it allows formaintaining the positions between the carriage bedplate, the rear end ofthe carriage and the carriage gib in any desired relationship and if anyof these parts becomeworn it is only necessary to loosen the screws 88and 89, move the gib downward the desired distance, to insure firmnessand then. tighten the screws.

When the various elements have been assembled upon the bedplate, asshown in Figs. 1 and 2, the advantages in assembling the entire machinewill be very apparent. The elements described above may be attached tothe bedplate before the machine, as a whole, is assembled, whichprocedure will simplify the assembling materially. But, if in aparticular machine it becomes desirable to have either more or lesselements attached to the bedplate, this change may be made byrearranging tl'ie relative positions of the various elements, if suchrearrangement is found necessary. By attaching these elements to thebedplate, instead of to themain frame of the machine, as is usually thecase, I more evenly distribute the weight and strain that must be borneby the various supporting members. This means that the thickness of thevarious parts will be more uniform and at the same time smoothness inoperation will be advanced.

Fig. 3 is a top plan view of the bedplate alone, showing the bedplateminus all attachments but in condition to have the same attachedthereto. Some of the features have already been described and I willhere describe the others.

The lugs 94, 95, 96, and 91 projecting from the forward edge thereof,are for the purpose of offering a base upon which the front side of thecarriage may slide, the lugs being bent for reception of an element ofthe carriage in order to prevent the same from being moved from itsproper position relative to the bedplate, as well as offering a baseupon which the carriage slides. The lug 42 is pierced as at 98 for thereception of a pivot and serves as a base towhich the ribbon vibrator 44may be pivotally attached. At one end of the bedplate is a slot 99 whichis merely for the purpose of facilitating assembly and dismounting thecarriage.

At the rear edge of the bedplate is a lug I to which the bell hammer IOIand bell trip I02 may be attached while one end of the spring I03, thatactuates the bell trip, may be attached to the hooked portion I04.

The opening I permits of the motive power reel extending slightly abovethe level of the top of the bedplate, in order that the cord or tape,which is fastened to the reel and the carriage may move back and forthbetween the bedplate and the carriage. A groove I06 extending for theentire length of the bedplate is, preferably, the first operation on thebedplate blank and is of suffilcient depth and breadth to accommodatethe letter-spacing rack bar which is attached to the under side of thecarriage.

After the groove I06 has been stamped up in the blank, it is then cut toform the various openings and projections and after these have beenformed there is a bending operation which includes the rear edge to forma flat base I01 to serve as a track over which the carriage may slide.This leaves the two body portions I09 and H0 which are utilized as abase to which the various elements may be welded.

The stamping may be done in one or more operations but from thestandpoint of efficiency and quality of the finished product, I havefound it preferably to complete the part in three operations. Of course,the mode of procedure may vary for a particular variety of typewriteraccording as the bedplate becomes more simplified, or more complicated,and also in accordance with the quality and weight of the metal. Thevarious bends lend a great deal of strength and rigidity to the plate.

The relative position of the various openings, projections, lugs, etc.may be varied in accordance with the construction of any particularmachine or in accordance with the best engineering practice, but I havefound the relative positions and dimensions illustrated in Fig. 3 to beparticularly convenient for use in the Masspro portable typewriter.

Figs. 4 and 5 are sectional views taken through the center of thebedplate and merely indicate more clearly the detailed constructionthereof, the various parts being numbered in accordance with the otherviews.

In Fig. 6 is an illustration of the novel bedplate in position in atypewriting machine, the machine being indicated generally by thenumeral I2I and it has the frame or sides I22 within which is a keylever support I23 for supporting the key levers I24, those beingconnected by links I25 to the key bars I26 which in turn are pivoted atI21 to a sector I28 that is supported on the segment plate I29. Thecarriage I30 is mounted upon the carriage bedplate I. The ribbon feedingand winding mechanism is indicated generally by the numeral I3I. Theentire carriage assembly is sufiiciently light so that the use ofrollers or balls will not be necessary and the carriage may contact withand slide directly on the carriage bedplate.

To more clearly illustrate the details of the assembly 5, Fig. 13showsthe hanger 6 without the attachments thereon. The lug to which thepivot II is attached cannot be seen but is directly in the rear of thenumeral 6. The pivot I3 extends through the openings I4 and I5 in theportions I32 and I33. The finger I2 of the carriage lock mechanismextends through the hole I 34 and the pivot 23 for the escapementoperator 22 which is attached through hole I35 of the foot 9 while thecarriage release arm 36 is pivoted by screw 31 in the opening I36 in thelug I31.

Fig. 14 shows the hanger 6 and some attached elements which have alreadybeen described.

The foregoing description and explanation clearly discloses the factthat I have provided a carriage bedplate capable of supporting many ofthe elements of usual construction of a typewriter, but arranged andassembled on the bedplate in a manner that greatly simplifies what wouldotherwise be a comparatively complex assembly and which renders theassembling of the rear portion of the typewriter extremely easy. Thissimplified assemblage is made possible by the novel bedplate and theform which it assumes as a finished product, with the additionalfeatures which are novel of construction and arrangement.

I claim:

1. In a typewriting machine, the combination with a main frame, aplurality of key levers pivotally mounted Within said frame andconnected with a plurality of type bars also pivotally mounted withinsaid frame of a sheet metal carriage bedplate having a projection fromthe front edge thereof for reception of a paper guide, a paper guideattached to said projection and prevented from turning thereon by turnedback portions of said guide fitting around two sides of said projection.

2. In a typewriting machine having a main frame, a plurality of keylevers pivotally mounted within said frame, a plurality of type barsalso pivotally mounted within said frame, a work carriage slidablymounted on a sheet metal carriage bedplate having a groove therein toaccommodate the carriage movement control rack bar, a hanger suspendedfrom the under side of said bedplate and attached thereto at points onboth sides of said groove and arranged for the reception of theescapement mechanism.

3. In a typewriting machine, a bedplate of punched and formed sheetmetal upon which the platen carriage is arranged to slide comprising aplurality of longitudinal ribs, a horizontally extending carriageslideway extending rearwardly of said ribs, a plurality of circularlycurved lugs extending forwardly of said ribs and spaced longitudinallythereof for guiding and retaining the carriage, a pair of dependingsupporting posts integrally united with the bedplate on the under sideof said ribs and near the respective ends thereof for supporting saidbedplate in its normal or shifted position.

4. In a typewriting machine having a longitudinally slidable platencarriage provided with a flat slide member at its rear and a round slidemember at its front, a sheet metal bedplate upon which said carriage isslidably mounted, comprising at least two raised corrugations forminglongitudinal strengthening ribs and a rearwardly projecting fiathorizontal slideway upon which said flat slide member of the carriage isarranged to slide, the front longitudinal rib of a d b p having spacedalong its free edge a plurality of forwardly extending circularly formedloops in which said round slide member of the carriage is arranged toslide and means for maintaining the platen carriage in slidable relationwith said bedplate.

5. In a typewriting machine having a longitudinally slidable platencarriage provided with a fiat slide member at its rear anda round slidemember at its front, a sheet metal bedplate upon which said carriage isslidably mounted, comprising at least two raised corrugations forminglongitudinal strengthening ribs and a rearwardly projecting flathorizontal slideway upon which said fiat slide member of the carriage isarranged to slide, the front longitudinal rib of said bedplate havingspaced along its free edge a plurality of forwardly extending circularlyformed loops in which said round slide member of the carriage isarranged to slide, a centrally located tongue piece depending from therear edge of said bedplate slideway and a gib adjustably secured to saidtongue piece in cooperative relation with said flat slide member of thecarriage for maintaining the latter in proper sliding relation with saidbedplate. v

6. In a typewriting machine having a longitudinally slidable platencarriage provided with a flatslide member at its rear and a round slidemember at its front, and a feed rack extending downward- 1ylongitudinally therebetween, a sheet metal bedplate upon which saidcarriage is slidably mounted, comprising two raised corrugations forminglongitudinal strengthening ribs, the two ribs being spaced apart to forma groove therebetween into which said carriage feed rack is adapted toextend, and a rearwardly projecting fiat horizontal slideway upon whichsaid flat slide member of the carriage is arranged to slide, the frontlongitudinal rib of said bedplate having spaced along its free edge aplurality of forwardly extending circularly formed loops in which saidround slide member of the carriage is arranged to slide and means formaintaining the platen carriage in slidable relation with said bedplate.

7. A typewriting machine as in claim 6 wherein an escapement forcooperation with said feed rack is operatively supported below thebedplate and a bracket spotweldcd to the under side of the bedplate isarranged to support said escapement, the bedplate being provided with anopening through which the escapement extends for cooperation with saidrack.

8. A typewriting machine as in claim 6 wherein the front rib of saidbedplate is provided with a tongue piece extending forwardly andupwardly from its front edge substantially at its middle and a paperguide arranged to cooperate with the platen carriage is fixedly mountedthereon.

9. A typewriting machine as in claim 6 wherein a signal bell forcooperation with the platen carriage is mounted on a depending bracketspotwelded to the under side of said bed plate and the rear edge of saidslideway is provided with a lug to which the bell hammer and operatingtrip are pivoted.

10. A typewriting machine as in claim 6 wherein a spring retracted backspace lever is arranged to cooperate with the rack on the platencarriage and the rear edge of said bedplate slideway is provided with anintegral pivot supporting lug for the back space lever and a hook lugfor its retracting spring.

11. A typewriting machine as in claim 6 wherein a ribbon vibrating leveris mounted in front of the platen carriage and the front edge of thefront rib of said bedplate is provided with an integral lug upon whichsaid lever is pivotally supported.

GEORGE F. ROSE.

